78688038 has 32 divisors (see below), whose sum is σ = 184891392. Its totient is φ = 22010400.

The previous prime is 78688031. The next prime is 78688069. The reversal of 78688038 is 83088687.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78688031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44998 + ... + 46713.

It is an arithmetic number, because the mean of its divisors is an integer number (5777856).

Almost surely, 2^78688038 is an apocalyptic number.

78688038 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

78688038 is an abundant number, since it is smaller than the sum of its proper divisors (106203354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78688038 is a wasteful number, since it uses less digits than its factorization.

78688038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91740.

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 78688038 is about 8870.6278244553. The cubic root of 78688038 is about 428.5184962881.

The spelling of 78688038 in words is "seventy-eight million, six hundred eighty-eight thousand, thirty-eight".